This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Physics Part I > Class 12 Physics (Part I) Chapter 3 Current Electricity – Quiz 2 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 2 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What is one possible reason why it's a good idea to conserve electricity? A) It is often produced by burning fossil fuels, which are a polluting, non-renewable resource. B) Using too much electricity can start dangerous electrical fires. C) Power companies only give each home a limited amount of electricity every day. D) Using too much electricity can cause power plants to break down. Show Answer Correct Answer: A) It is often produced by burning fossil fuels, which are a polluting, non-renewable resource. 2. Which digit on the 1$^{st}$ band does the color yellow denote on a resistor color band? A) 2. B) 7. C) 3. D) 4. Show Answer Correct Answer: D) 4. 3. Ohm's law is not applicable to ..... A) Dc circuits. B) High currents. C) Small resistors. D) Semi-conductors. Show Answer Correct Answer: D) Semi-conductors. 4. An object with a negative charge will A) Attract the north pole of a magnet. B) Repel an object with a positive charge. C) Attract an object with a negative charge. D) Attract an object with a positive charge. Show Answer Correct Answer: D) Attract an object with a positive charge. 5. Which is the best conductor of electricity? A) Carbon. B) Copper. C) Iron. D) Silver. Show Answer Correct Answer: D) Silver. 6. The third ring in the resistor indicates the ..... A) Multiplier. B) Tolerance. C) Significant figure. D) Resistivity. Show Answer Correct Answer: A) Multiplier. 7. Measured in amperes or amps A) Voltage. B) Current. C) Resistance. D) None of the above. Show Answer Correct Answer: B) Current. 8. If the power source was set on 4.0V and there were 1 lights, what would the voltage be across the light? A) 0.0 V. B) 2.0 V. C) 4.0 V. D) 1.0 V. Show Answer Correct Answer: C) 4.0 V. 9. What are the three main parts of a circuit? A) Load, power, buzzer. B) Switch, pathway, pathway. C) Load, power, switch. D) Pathway, load, power. Show Answer Correct Answer: D) Pathway, load, power. 10. What is the resistance of a conductor directly proportional to? A) Length of the conductor. B) Temperature. C) Voltage. D) Area of cross-section. Show Answer Correct Answer: A) Length of the conductor. 11. What are the components of a simple circuit? A) Wires, battery, load. B) Battery, switch, motor. C) Wires, switch, outlet. D) Wires, buzzer, motor. Show Answer Correct Answer: A) Wires, battery, load. 12. What happens to the resistance of a conductor as its temperature increases? A) Increases. B) Decreases. C) Becomes zero. D) Remains the same. Show Answer Correct Answer: A) Increases. 13. In a Series circuit the more lightbulbs you add the brighter they get A) False. B) True. C) All the above. D) None of the above. Show Answer Correct Answer: A) False. 14. A student has 10 resistors of resistance r each. The minimum resistance made by him from the given resistors is A) R/100. B) R/10. C) 10 r. D) 5/5. Show Answer Correct Answer: B) R/10. 15. In an experiment with potentiometer to measure the internal resistance of a cell, when the cell is shunted by 5 resistance, the null point is obtained at 2m. When the cell is shunted by 20 resistance, the null point is obtained at 3m, The internal resistance of cell is: ..... A) 6 ohm. B) 4 ohm. C) 2 ohm. D) 8 ohm. Show Answer Correct Answer: C) 2 ohm. 16. The potential difference between the two ends of the wires is equal to the ..... A) Resistance. B) Energy source current. C) Potential difference between the two terminals of the battery. D) The parallel end of the component. Show Answer Correct Answer: C) Potential difference between the two terminals of the battery. 17. True or False:Electrons are the mobile charge carriers in an electric circuit. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 18. An electric current always flows in a closed path, or loop. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 19. The other name for voltage is A) Potential difference. B) Resistance. C) Load. D) Current. Show Answer Correct Answer: A) Potential difference. 20. Changes chemical energy into electrical energy A) Resistor. B) Fuse. C) Terminal. D) Cell. Show Answer Correct Answer: D) Cell. 21. When we double both the voltage and current in a simple electric circuit keeping its resistance constant, the power will be A) Quadruples. B) Halves. C) Doubles. D) Remain unchanged. Show Answer Correct Answer: A) Quadruples. 22. The flow of electricity requires a A) Complete path. B) Incomplete path. C) Insulated current. D) None of the above. Show Answer Correct Answer: A) Complete path. 23. Which is not an example of Human-harnessed electricity? A) Lightening. B) Hydroelectric dam. C) Wind mill. D) Lamp. Show Answer Correct Answer: A) Lightening. 24. What is the primary function of generators in power plants? A) To change electrical energy into mechanical energy. B) To change mechanical energy into electrical energy. C) To store electrical energy. D) None of the above. Show Answer Correct Answer: B) To change mechanical energy into electrical energy. 25. Kirchhoff's second law is based on law of conservation of A) Sum of mass and energy. B) Momentum. C) Energy. D) Charge. Show Answer Correct Answer: C) Energy. 26. What is the SI unit of current? A) Ohm. B) Ampere. C) Volt. D) Coulomb. Show Answer Correct Answer: B) Ampere. 27. What is the property of matter which causes two like charges to repel each other? A) Electric charge. B) Electromagnet. C) Electric field. D) Electric circuit. Show Answer Correct Answer: A) Electric charge. 28. The current in which negative charges start from negative terminal and ends in the positive terminal is known as A) Conventional Current. B) Electronic Current. C) Ionic Current. D) All the above. Show Answer Correct Answer: B) Electronic Current. 29. An appliance which is connected in a circuit A) Key. B) Cell. C) Load. D) Rheostat. Show Answer Correct Answer: C) Load. 30. What is the power of a lamp whose current is 6 A and the voltage across it is 120 V? A) 10 W. B) 120 W. C) 720 W. D) 16 W. Show Answer Correct Answer: C) 720 W. 31. The internal resistance of a cell is the resistance of A) Vessel of the cell. B) Electrodes of the cell. C) Material used in the cell. D) Electrolyte used in the cell. Show Answer Correct Answer: D) Electrolyte used in the cell. 32. Unit for resistance A) Watt. B) Ohm. C) Ampere. D) Volt. Show Answer Correct Answer: B) Ohm. 33. We have 30 Watt, 6V bilb which we want to glow by supply of 120V. What resistance should be connected with the bulb? A) 20 ohm in series. B) 22.8 ohm in series. C) 30 ohm in series. D) 22.8 ohm in parallel. Show Answer Correct Answer: B) 22.8 ohm in series. 34. Calculate the current an electric clothes dryer draws when it is connected to a 230 V source and has a resistanceof 9.2 $\Omega$. A) 25A. B) 15A. C) 5A. D) 35A. Show Answer Correct Answer: A) 25A. 35. What slows down the flow of electricity in a circuit? A) Current. B) Resistance. C) Voltage. D) Source of electric current. Show Answer Correct Answer: B) Resistance. 36. In a computer, electric energy is transformed into all of the following except ..... energy. A) Thermal energy. B) Light energy. C) Sound energy. D) Kinetic (motion) energy. Show Answer Correct Answer: D) Kinetic (motion) energy. 37. What device transforms mechanical energy into electrical energy? A) Electric Motor. B) Generator. C) All the above. D) None of the above. Show Answer Correct Answer: B) Generator. 38. Two identical conductors maintained at same temperatures are given potential differences in the ratio 1:2. Then the ratio of their drift velocities is A) 1:1. B) 1:4. C) 1:2. D) 3:2. Show Answer Correct Answer: C) 1:2. 39. What is the formula for calculating the total resistance of resistors in parallel? A) R = R1 * R2. B) 1/R = 1/R1 + 1/R2. C) R = R1 + R2 + R3. D) R = R1-R2. Show Answer Correct Answer: B) 1/R = 1/R1 + 1/R2. 40. In a series cricuit, a battry has 12 volts, and there are two bulbs, what are the amount of volts in each lightbulb? A) One bulb as 3 volts while another has 9 volts. B) Each one has 6 volts. C) Each one has-6 volts. D) Each bulb has-9 volts. Show Answer Correct Answer: C) Each one has-6 volts. 41. Shorter wire creates ..... resistance. A) More. B) Less. C) No change in. D) None of the above. Show Answer Correct Answer: B) Less. 42. What is the minimum resistance which can be made using five resistors each of 1/5 ohm? A) 1/10 ohm. B) 1/2.5 ohm. C) 1/25 ohm. D) 1/5 ohm. Show Answer Correct Answer: C) 1/25 ohm. 43. An electric iron box rated 750 W Operated for 2 hours per day, if the cost of unit Is Rs 3.00 per kWh, then the cost of energy used to operate electric iron box for 30 days is A) Rs 185. B) Rs 135. C) Rs 125. D) Rs 308. Show Answer Correct Answer: B) Rs 135. 44. The positive temperature co efficient of resistance is for A) Copper. B) An electrolyte. C) Germanium. D) Wood. Show Answer Correct Answer: A) Copper. 45. In a simple circuit, if the resistance is doubled, what happens to the current? A) It halves. B) It becomes zero. C) It doubles. D) It remains the same. Show Answer Correct Answer: A) It halves. 46. A student tests an unknown substance that she believes to be a metal. Which of the following observations would indicate that the unknown substance is a metal? A) It is a good conductor of electricity. B) It can break easily and is very brittle. C) It can easily float in water. D) It is brown and dull. Show Answer Correct Answer: A) It is a good conductor of electricity. 47. In a series circuit, which of the following will vary based on the resistor? A) Power. B) Voltage. C) Current. D) None of the above. Show Answer Correct Answer: B) Voltage. 48. For electricity to flow, what do you need? A) Only a battery. B) Only a battery and a light bulb. C) Only a battery, light bulb and wire. D) A battery, light bulb and wire in a closed circuit. Show Answer Correct Answer: D) A battery, light bulb and wire in a closed circuit. 49. What is the basic property of electrical conducting materials? A) Reverses the direction of current in the materials. B) Leaks the current through the materials. C) Blocks the passage of current through the materials. D) Allows the passage of current through the materials. Show Answer Correct Answer: D) Allows the passage of current through the materials. 50. Which is the unit of measure for current? A) Joule. B) Volt. C) Amp. D) Coulomb. Show Answer Correct Answer: C) Amp. 51. A 10 m long wire of resistance 15 ohm is connected in series with a battery of emf 2V (no internal resistance) and a resistance of 5 ohm. The potential gradient along the wire is: ..... A) 1.5 Vm$^{-1}$. B) 4.5 Vm$^{-1}$. C) 0.45 Vm$^{-1}$. D) 0.15 Vm$^{-1}$. Show Answer Correct Answer: D) 0.15 Vm$^{-1}$. 52. If voltage applied on a capacitor is increased from V to 2 V A) Q remains same, C doubled. B) Q is doubled, C doubled. C) C remains same, Q doubled. D) None of the above. Show Answer Correct Answer: C) C remains same, Q doubled. 53. Meaning of Current A) Flow. B) Latest. C) Ongoing. D) All the above. Show Answer Correct Answer: D) All the above. 54. "The sum of all voltage drops in a series circuit equals the total applied voltage." This is know as what? A) Bolen's Law. B) Ohm's Law. C) Kirchhoff's Current Law. D) Kirchhoff's Voltage Law. Show Answer Correct Answer: D) Kirchhoff's Voltage Law. 55. Kirchoff's Second Law for the electric network is based on A) Law of conservation of charge. B) Law of conservation of mass. C) Law of conservation of energy. D) Law of conservation of angular momentum. Show Answer Correct Answer: C) Law of conservation of energy. 56. In a network maximum power transfer occurs when ..... A) R$_{Th}$= R$_{L}$. B) R$_{Th}$=-R$_{L}$. C) R$_{Th}$/R$_{L}$ =0. D) R$_{Th}$+R$_{L}$= 1. Show Answer Correct Answer: A) R$_{Th}$= R$_{L}$. 57. A wire has resistance of 12 ohms is bent to form a square.The resistance between the two diagonal points would be A) 24 ohms. B) 3 ohms. C) 12 ohms. D) 6 ohms. Show Answer Correct Answer: B) 3 ohms. 58. Among the following which gives current due to its flow? A) Neutron. B) Atom. C) Proton. D) Electron. Show Answer Correct Answer: D) Electron. 59. A student kept her 60-watt, 120-volt study lamp turned on from 2:00 PM until 2:00 AM. How many coulombs of charge went through it? A) 18, 000. B) 21, 600. C) 3, 600. D) 7, 200. Show Answer Correct Answer: B) 21, 600. 60. Which poles on the earth change? A) The North and South. B) The magnetic poles. C) The geographic poles. D) The telephone poles. Show Answer Correct Answer: B) The magnetic poles. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Physics (Part I) Chapter 3 Current Electricity Quiz 1Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 3Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 4Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 5Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 6Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 7Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 8Class 12 Physics (Part I) Chapter 3 Current Electricity Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books